"This leaves grains to find support off talk of dry conditions in South America. Argentina grain bureau said today they have been overly dry for the last month and there's no rain in site, lending to talk of lower production on early planted corn and beans."

China was active on today's weekly export sales report, in buying corn for the second consecutive week and beans as well.

"This could be their fearing of a continuation of the drought and traders see them potentially overbooking U.S. crops as an import hedge."